org.apache.hadoop.hbase.regionserver

Class MetricsTableAggregateSourceImpl

java.lang.Object

org.apache.hadoop.hbase.metrics.BaseSourceImpl

org.apache.hadoop.hbase.regionserver.MetricsTableAggregateSourceImpl

All Implemented Interfaces:

BaseSource, MetricsTableAggregateSource, org.apache.hadoop.metrics2.MetricsSource

@InterfaceAudience.Private
public class MetricsTableAggregateSourceImpl
extends BaseSourceImpl
implements MetricsTableAggregateSource

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG
private ConcurrentHashMap<String,MetricsTableSource>	tableSources

Fields inherited from class org.apache.hadoop.hbase.metrics.BaseSourceImpl

metricsAdapter, metricsContext, metricsDescription, metricsJmxContext, metricsName, metricsRegistry, registry

Fields inherited from interface org.apache.hadoop.hbase.regionserver.MetricsTableAggregateSource

METRICS_CONTEXT, METRICS_DESCRIPTION, METRICS_JMX_CONTEXT, METRICS_NAME, NUM_TABLES, NUMBER_OF_TABLES_DESC

Fields inherited from interface org.apache.hadoop.hbase.metrics.BaseSource

HBASE_METRICS_SYSTEM_NAME

Constructor Summary

Constructors

Constructor and Description
MetricsTableAggregateSourceImpl()
MetricsTableAggregateSourceImpl(String metricsName, String metricsDescription, String metricsContext, String metricsJmxContext)

Method Summary

Modifier and Type	Method and Description
void	deleteTableSource(String table) Remove a table's source.
void	getMetrics(org.apache.hadoop.metrics2.MetricsCollector collector, boolean all) Yes this is a get function that doesn't return anything.
MetricsTableSource	getOrCreateTableSource(String table, MetricsTableWrapperAggregate wrapper) Returns MetricsTableSource registered for the table.
private void	register(MetricsTableSource source)

Methods inherited from class org.apache.hadoop.hbase.metrics.BaseSourceImpl

decGauge, getMetricsContext, getMetricsDescription, getMetricsJmxContext, getMetricsName, getMetricsRegistry, incCounters, incGauge, init, removeMetric, setGauge, updateHistogram

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hbase.metrics.BaseSource

decGauge, getMetricRegistryInfo, getMetricsContext, getMetricsDescription, getMetricsJmxContext, getMetricsName, incCounters, incGauge, init, removeMetric, setGauge, updateHistogram

Field Detail

LOG

private static final org.slf4j.Logger LOG

tableSources

private ConcurrentHashMap<String,MetricsTableSource> tableSources

Constructor Detail

MetricsTableAggregateSourceImpl

public MetricsTableAggregateSourceImpl()

MetricsTableAggregateSourceImpl

public MetricsTableAggregateSourceImpl(String metricsName,
                                       String metricsDescription,
                                       String metricsContext,
                                       String metricsJmxContext)

Method Detail

register

private void register(MetricsTableSource source)

deleteTableSource

public void deleteTableSource(String table)

Description copied from interface: MetricsTableAggregateSource

Remove a table's source. This is called when regions of a table are closed.

Specified by:

deleteTableSource in interface MetricsTableAggregateSource

Parameters:

table - The table name

getOrCreateTableSource

public MetricsTableSource getOrCreateTableSource(String table,
                                                 MetricsTableWrapperAggregate wrapper)

Description copied from interface: MetricsTableAggregateSource

Returns MetricsTableSource registered for the table. Creates one if not defined.

Specified by:

getOrCreateTableSource in interface MetricsTableAggregateSource

Parameters:

table - The table name

getMetrics

public void getMetrics(org.apache.hadoop.metrics2.MetricsCollector collector,
                       boolean all)

Yes this is a get function that doesn't return anything. Thanks Hadoop for breaking all expectations of java programmers. Instead of returning anything Hadoop metrics expects getMetrics to push the metrics into the collector.

Specified by:

getMetrics in interface org.apache.hadoop.metrics2.MetricsSource

Overrides:

getMetrics in class BaseSourceImpl

Parameters:

collector - the collector

all - get all the metrics regardless of when they last changed.